Lock.



P. L. WIKHEIM.

i LocK. APPLICATION FILED SEPT. l l, 1916.

Patented Oct. 30, 1917.

UNITED STATES PATENT onirica.

rnnnn L. wI-KHEIM, or nvEnnTT, wAsHINGToN.

Loox.

Specification of Letters Patent.

Patented Oct. 30, 1917.

Application filed September 11, 1916. Serial No. 119,431.

To all whom t may concern.

Be it known that I, PEDER yL. WIKHEIi/i,

'adapted t0 use on automobiles and the like for cutting out ignitioncircuits. A further object of my device is to provide a lock havingmeans for retaining the lock in a neutral position from which it may bethrown to a locked or unlocked position without the use of a key, butwhich will require a` key to release it from either the locked orunlocked position.

Other objects will appear as my mvention is more fully explained in thevfollowing specification, illustrated in the accompanying draw'ng andpointed out in` the appended cl ims.

In the drawings, Figure 1 is a central cross sectional elevation of mydevice. Fig. 2 is a sectional plan of'my device taken along line XX ofFig. 1. Fig. 3 is development of a portion of my device.

Referring more particularly to lthe drawings, numeral 1 indicates acylindrical outer casing which is closedat the bottom and which isyprovided with a cap 2 at the top.

Casing 1 may be coupled to an extension casing 3 and the lower end ofwhich is provided with a switch casing 4. A lock cylinder 5 ts snuglywithin the upper portion of casing 1 and `is retained against removalfrom said casing by the cap 2.'y Lock cylinder 5 is provided with ashoulder portion 6, bolt retaining notches 7 and bolt retaining holes 8.A spiral slot 9 is also cut in lock cylinder 5 and is provided with aneutral position notch 10. The cylinder 5 is retained within casing 1 ina fixed position and encompasses the locking mechanism which includes arevoluble and slidable plug 11 having.,r a shoulder portion' Y12 securedtov its lower end Awh-ich retains the plug against withdrawal by contactwith the shoulder 6. Plug 11 istubular and contains a key opcratingcombination lock stem '13. Stem 13 is provided with an elliptical collar14 adjacent its lower end which engages the tops of lock bolts 15. Thelock bolts 15 are mounted on pins which are secured to the lower end ofplug 11. It will be understood that .the stem 13 is rotatableindependent of the plug 11 only when released from engagement with theplug by meansof a suitable l and proper key which is inserted within agroovev17 in the said stem. When the key has been inserted in the stemit is possible to revolve the stem with the result that the ellipticalcollar 14: forces apart thetops of bolts 15, 'thereby withdrawing thelower or hooked end of said bolts from engagement with either the boltnotches 7 or the bolt A holes 8 as the case may be. A pin 19 is securedto an extension of lower end of plug 11 and engages the slot 9 of thelock cylinder 5. When the bolts are withdrawn from engagement with thenotches 7 the plug 11 may be revolved and is controlled in its movementby means of pin 19 and slot 9 so that it raises as well as revolves theplug 11. The lower portions of bolts 15 engages lugs ,upon the head 2Oof a shouldered rod. 21 so that the rod 21 will be revolved in unisonwith the bolts 15. The rod 21 is held up against the bolts 15 by meansof a Spring 22. The lower portion of rod 21 passes down through tubularcasing 3 and is provided at its lower end with switches 24 which areadapted to close terminals 25 of the ignition circuits .26 which lead tothe various cylinders of the engine of an automobile or the like. Itwill be noted that the drawing as shown illustrates the device in alocked position with the circuits broken and that as the plug 11 and itsattached arts are raised and revolved the rod 21 wil also be raised andrevolved with the result that the switches 24 will contact with theterminals 25, thereby completing the circuits. When the bolts have beenwithdrawn from notches 7 and the plug has been partially raisedv androtated so that the pin 19 engages the notch 10, it will be understoodthat the key may then be withdrawn from the plug and that ,the lock'willbe retained in a neutral position; that is, in "a position in which thecircuits are locked in neither closed nor open position but one fromwhich the devicemay be v easily moved to either of the above positions.

gagement with either the notches 7 or'the holes 8.

While I have shown a particular form of embodiment of my invention, I amaware that many minor changes therein will readily suggest themselves toothers skilled in the art without departing from the spirit and scope ofthe invention, and I therefore desire to avoid being limited to theexact form shown and described. Having described my invention, what Iclaim as new and desire to protect by Letters Patent, is-

l. In a circuit breaking lock, includin a stationary outer casing and alock cylin er within said casing, the combination of a key l operatedlock-plug slidably and revolubly mounted in said cylinder, a shoulderedrod operable by said plug, circuit breaking switches mounted on said rodand slidable and rotatable with said lock plug, whereby the saidcircuits are closed when the rod is reciprocated and revolved.

2. In a switch lock, the combination of circuit terminals arrangedoppositely, a terminal closing switch revolubly and' slidably arrangedbetween said terminals and adapted to connect said terminals, arevoluble key o erated plug revolubl and slidably mounted in astationary loc cylinder, lock bolts operable by said plug and adapted tolock said plug and cylinder together, and a shouldered rod secured tosaid switch and coperating with said bolts, whereby the said switchrevolves and slides in unison with said bolts and plug.

PEDER L. WIKHEIM.

